export const DAY_TIMESTAMP = 60 * 60 * 24 * 1000
export const HOUR_TIMESTAMP = 60 * 60 * 1000
export const MINUTE_TIMESTAMP = 60 * 1000

export function formatDate(date, fmt = 'YYYY-MM-DD HH:mm:ss') {
    if (!date) {
        return ''
    }
    if (typeof date === 'string') {
        date = new Date(date.replace(/-/g, '/'))

    }
    if (typeof date === 'number') {
        date = new Date(date)
    }
    if (date.toString() === 'Invalid Date') {
        return ''
    }

    var o = {
        'M+': date.getMonth() + 1,
        'D+': date.getDate(),
        'h+': date.getHours() % 12 === 0 ? 12 : date.getHours() % 12,
        'H+': date.getHours(),
        'm+': date.getMinutes(),
        's+': date.getSeconds(),
        'q+': Math.floor((date.getMonth() + 3) / 3),
        'S': date.getMilliseconds()
    }
    var week = {
        '0': '\u65e5',
        '1': '\u4e00',
        '2': '\u4e8c',
        '3': '\u4e09',
        '4': '\u56db',
        '5': '\u4e94',
        '6': '\u516d'
    }
    if (/(Y+)/.test(fmt)) {
        fmt = fmt.replace(RegExp.$1, (date.getFullYear() + '').substr(4 - RegExp.$1.length))
    }
    if (/(E+)/.test(fmt)) {
        fmt = fmt.replace(RegExp.$1, ((RegExp.$1.length > 1) ? (RegExp.$1.length > 2 ? '\u661f\u671f' : '\u5468') : '') + week[date.getDay() + ''])
    }
    for (var k in o) {
        if (new RegExp('(' + k + ')').test(fmt)) {
            fmt = fmt.replace(RegExp.$1, (RegExp.$1.length === 1) ? (o[k]) : (('00' + o[k]).substr(('' + o[k]).length)))
        }
    }
    return fmt
}

export function getZeroDate(date) {
    const year = date.getFullYear()
    const month = date.getMonth() + 1
    const day = date.getDate()
    return new Date(year + '/' + month + '/' + day + ' 00:00:00')
}
